Railroad-spike



'F. R. PIPKIN.

RAILROAD SPIKE.

MIUCMION FILED OCT. 6, 1919.

1,338, 154. Patented Apr. 27, 1920.

UNITED STATES PATENT OFFICE.

FRANK R. PIPKIN, or GBEENFIELDQARKANSA'S.

RAILROAD-SPIKE.

Specification of Letters Patent.

Application filed October 6, 1919. Serial No. 328,839.

To allwhom z'tmay concern: I

Be it known that I, FRANK R. PIPKIN, a citizen of the United States,residing at (irreenfield, in the county of Poinsett and State ofArkansas, have invented certain new and useful Improvements in Railroad-Spikes, of which the following is a specifi' rectangular incross-section. Instead of the usual head, a large plate 3' is formed onor secured to the top endof thespike. This plate is preferablytriangular in form, and

the shank 2 projects from its apex end portion and at a right angle toits under surface, which is fiat. The plate is thickest at its apex endportion, and it tapers gradually from its apex portion to the other side7 or end opposite to its apex portion.

A notch 5 is formed in the underside of stantiall signature.

the apex portion of the plate on the other side of the spike from themain portion of the plate. This notch fits over the flange of. the rail,a portion of which is indicated in dotted lines in Fig. 1. The narrowend Patented Apr. 27,1920.

of the plate?) is preferably about three substantially twice the widthof its narrowend, and the, plate is longer than its greatest breadth.

The spike is driven into the wooden cross-.

tie alongside the rail, and the flat underside of the plate bearsv onthe top of the cross tie, and prevents the spike and rail from "beingpressed laterally by the side pressure of the'wheel flanges of thewheels of the locomotive engines and' cars.

What I claim is:

In, a railroad jspike, a shank having a relatively long and.substantially triangular plate the narrow end portion; of which issecured to the top of the shank and which is substaritiallythree timesas wide as the shank, thebroad end of the plate being subtwice as wideas its narrow end,

and sai platelhaving a' fiat underside of times as Wide as the shanlnits broad end is i v relatively large area which bears on the tiewhenthe shank is driven into it.

In testimony whereof I have affixed my FRANK R. PIPKIN.

